collaborators

9 papers

quant-ph2026

Distilling Unitary Operations: A No-Go Theorem and Minimal Realization

Jiayi Zhao, Yu-Ao Chen, Guocheng Zhen +3

Quantum gates executed on physical hardware are inevitably degraded by environmental noise. While state purification effectively distills static quantum resources, the dynamic exec…

quant-ph2026

Power and limitations of distributed quantum state purification

Benchi Zhao, Yu-Ao Chen, Xuanqiang Zhao +3

Quantum state purification protocols, which mitigate noise by converting multiple copies of noisy quantum states into fewer copies with a lower noise level, have applications in qu…

quant-ph2026

Optimal Hamiltonian recognition of unknown quantum dynamics

Chengkai Zhu, Shuyu He, Yu-Ao Chen +2

Identifying unknown Hamiltonians from their quantum dynamics is a pivotal challenge in quantum technologies. In this paper, we introduce Hamiltonian recognition, a framework that b…

quant-ph2025

Structure, Optimality, and Symmetry in Shadow Unitary Inversion

Guocheng Zhen, Yu-Ao Chen, Mingrui Jing +3

Reversing unitary operations is a key task in quantum computing and quantum control. In this work, we introduce and develop the framework of shadow unitary inversion, a relaxed var…

quant-ph2025

Quantum Algorithm for Reversing Unknown Unitary Evolutions

Yu-Ao Chen, Yin Mo, Yingjian Liu +2

Reversing an unknown quantum evolution is of central importance to quantum information processing and fundamental physics, yet it remains a formidable challenge as conventional met…

quant-ph2025

Virtual Quantum Markov Chains

Yu-Ao Chen, Chengkai Zhu, Keming He +2

Quantum Markov chains generalize classical Markov chains for random variables to the quantum realm and exhibit unique inherent properties, making them an important feature in quant…